The heartbeat is initiated and regulated by nodal tissue made of specialised cardiac muscles called:
Q1. The heartbeat is initiated and regulated by nodal tissue made of specialised cardiac muscles called:
Answer: Sinoatrial node
Explanation: The sinoatrial (SA) node, located in the right atrium, spontaneously generates electrical impulses that initiate each heartbeat, earning it the title of the heart's natural pacemaker.